[css3-fonts] mutiple formats in src descriptor

Sorry, but in the case of the src font descriptor [1], I don't
understand exactly the use case for a format() hint containing more
than one format string. For instance:

   src: url(foo) format("woff", "opentype");

Is it to handle the case where a single URL can reference multiple
font objects of different formats? In that case, what's the mechanism
used for the format selection between user agent and server? Content
negociation based on the format string?

I have the feeling a clarification is needed here and some prose
giving answers to the questions above would be most welcome.

An extra example in Example IX would also be nice.

[1] http://www.w3.org/TR/css3-fonts/#src-desc

</Daniel>

Received on Wednesday, 25 May 2011 19:06:50 UTC